Clutch



All@ 25, '1942 Y c. M. F. FRIDEN 2,294,112

CLUTCH Original Filed June 2, 1937 FICE-LL* N NIQR INVENTOR Far/ 7W. F. Fr/'derv WMM ATTORNEY -bodiment of the 2,294,112 PATENT orricE 2,294,112 CLUTCH Carl M. F. Friden, Pleasanton, Calif., assigner to Friden Calculating ration of California Original application achine Co., Inc., a corpo- .une 2, 1937, Serial No.

145,979. Divided and this application Decem- V ber 16, 1940, Serial No. 370,255

1 claim.

This invention relates to clutch mechanisms and is concerned more particularly with the provision of an improved clutch and clutch control means particularly adapted for use in cyclically operable mechanisms such as calculating machines, for example.

This application is a division of my copending application, Ser. No. 145,979, led June 2,

1937 and issued as Patent No. 2,279,455 on -April 14, 1942, for Calculating machine.

It is a general' object of the invention to provide7 an improved clutch mechanism. v

Another object of the invention is to provide a simple and reliable cyclic clutch means for controlling the drive for calculating machines.

Another object of the invention is to provide a clutch mechanism of the character referred to in which the engaged driving parts can be released freely without interference because of their engaged relation.

Other objects and advantages will be apparent from the following description of a preferred eminvention as illustrated in the accompanying drawing, in which:

Figure 1 is a fragmentary elevational view partly in section of the drive mechanism of a calculating machine.

Figure 2 is a sectional view of the clutch taken in the plane of the line 2 2 of Figure 1.

In controlling the drive of cyclically operable calculating machines, it is desirable that the cyclic clutch mechanism be readily moved to and from its engaged position with a minimum of eiort and with suiiicient rapidity that one or more cycles of operation can be controlled easily irrespective of the high speed operation (from 500 to 1000 R. P. M.) of such machines.

In the embodiment selected for illustration and referring to Figure 1, the mechanism may include a frame plate or supporting structure 22 in which is journaled drive gear 63 of a suitable electricv -motor or other source of power. Gear 63 is connected by gear 64 with a gear 65. Gear 65 is journaled by anged `collar 66 on a transverse driven shaft 4| and hasv driving clutch member or ratchet 61 formed on the hub thereof. The driven clutch member `comprises disc 68 having its hub pinned on shaft 4| and ring 69 secured in spaced relation from disc 68 by suitable studs 10. Disc 68 is journaled in bearing 1| secured in side plate 22 and engages the hub of gear 65 and the end of collar 66which has its opposed end in abutting relation with a suitable retaining hub 12 secured on shaft 4|.

Thedriven clutch member carries a drive establishing element in the Aform pivoted at one end between disc 68 and ring 69 on one of studs 18, and has an arcuate slot 11 adjacent its other end engaged by another'oi' studs 10. Pawl 16 is urged to active position by of pawl 16 which isl Lever 8| carries roller Vment of'clutch control lever 8| Y other end of spring 18 and intermediate its ends has tooth 19 for engagement with the teeth of ratchet 61 to establish the drive connection. Pawl 16 is restrained from movement to active position in the neutral or full cycle position of the parts by clutch control lever 8| pivoted at 82 on side plate 22 and having a nose or stop 83 for engagement with shoulder 84 at the free end of pawl 1B.

86 which seats in depression 81 on ring S9 in the full cycle position thereof, and in the other positions thereof is engaged with the periphery of ring 69 to maintain lever 8| in its clutch engaging position for a purpose later referred to.

It is seen, therefore, that one or more cycles of operation of the actuating mechanism can be determined by oscillation of clutch control lever 8|. Simultaneously with movement of control lever 8|, the circuit for the drive motor is established by means of link extension 9| of lever 92 pivoted at 93 on side plate 22. At its lower end lever 92 is pivotally associated with lever 94 pivoted at 95 on plate 22 and having pin 96 of insulating material overlapping one of spring contacts 91 of the motor circuit. Thus, movesimultaneously conditions the clutch and the motor circuit. Referring to Figure l, it will be lnoted that the relative positions of the shoulder 84 on pawl 16, tooth 19, and its pivot 10, is such that the pawl 16 can be freely rocked to disengage tooth 19 from one of the ratchet teeth without an interfering binding action between the engaged teeth. In other words, tooth 19 in moving to disengaged position does not have to cause any reverse movement of the ratchet 61. Also, with the clutch disengaged as shown in Figure 1, the relation of the pivot of the clutch control lever 8| and its nose 83 is such that the lever can be freely rocked to disengaged position without having to effect movement of the dog 16 in process.

I claim:

In a clutch, a cyclically operable shaft, a i

ratchet journalled on said shaft and driven from a source of power, a driven clutch member secured on said shaft adjacent said ratchet, a spring-urged drive establishing pawl pivoted at one end on said clutch member. means for limiting the pivotal movement of said pawl on said member, a tooth on said pawl intermediate the ends therefor for engagement with said ratchet, a stop movable into and out of the path of the said pawl for controlling the engagement of said tooth with said ratchet, and a roller on said stop and enga-geable with said driven clutch member for vcontrolling movement of said stop, said driven clutch member having a depression for receiving saidy roller in the full cycle position of said driven clutchmember.

CARL M. F. FRIDEN. 

